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非结构糖在柠条(Caragana korshinskii K.)再生生长和持续生存中的作用 被引量:3
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作者 王先之 方向文 +2 位作者 贾国梅 金胜利 王刚 《中国沙漠》 CSCD 北大核心 2006年第4期585-589,共5页
柠条在地上组织破坏后从根颈处萌蘖出大量的一年生枝,根系储存的碳水化合物将供应地上生长。但连续刈割后根系储存物质如何变化,储存物质在柠条生长和维持存活中的作用仍须研究。本文在不同时间段内对柠条新萌蘖枝进行连续去除(处理1:对... 柠条在地上组织破坏后从根颈处萌蘖出大量的一年生枝,根系储存的碳水化合物将供应地上生长。但连续刈割后根系储存物质如何变化,储存物质在柠条生长和维持存活中的作用仍须研究。本文在不同时间段内对柠条新萌蘖枝进行连续去除(处理1:对照,3月28日刈割1次后不再处理;处理2:从萌芽到6月9日,每3 d去除一次新萌发枝;处理3:从萌芽到6月24日,每3 d去除一次新萌发枝;处理4:从萌芽到7月15,每3 d去除一次新萌发枝)。结果表明:处理3和4在7月非结构糖含量显著高于处理1和2,说明处理1和2将根系储存的非结构糖用于地上生物量的恢复。连续刈割处理(处理3和4)导致柠条根系非结构糖含量持续下降,这主要是由根系呼吸作用引起。秋末对当年生枝统计结果表明,各处理之间当年生枝数/刈割枝在各处理间差异不显著,说明柠条对外界的破坏具有极强的忍耐能力。 展开更多
关键词 柠条(Cnmgnnn korshinskii k.) 非结构糖 刈割 再生生长 根系储存物质
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Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China
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作者 SHEN Jianxiang WANG Xin +9 位作者 WANG Lei WANG Jiahui QU Wenjie ZHANG Xue CHANG Xuanxuan YANG Xinguo CHEN Lin QIN Weichun ZHANG Bo NIU Jinshuai 《Journal of Arid Land》 SCIE CSCD 2024年第4期550-566,共17页
Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert areas.However,the self-succession ability of native plants durin... Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert areas.However,the self-succession ability of native plants during the later periods of vegetation restoration remains unclear.Therefore,this study was conducted to bridge the knowledge gap by investigating the regeneration dynamics of artificial forest under natural conditions.The information of seed rain and soil seed bank was collected and quantified from an artificial Caragana korshinskii Kom.forest in the Tengger Desert,China.The germination tests were conducted in a laboratory setting.The analysis of species quantity and diversity in seed rain and soil seed bank was conducted to assess the impact of different durations of sand fixation(60,40,and 20 a)on the progress of vegetation restoration and ecological conditions in artificial C.korshinskii forest.The results showed that the top three dominant plant species in seed rain were Echinops gmelinii Turcz.,Eragrostis minor Host.,and Agropyron mongolicum Keng.,and the top three dominant plant species in soil seed bank were E.minor,Chloris virgata Sw.,and E.gmelinii.As restoration period increased,the density of seed rain and soil seed bank increased first and then decreased.While for species richness,as restoration period increased,it gradually increased in seed rain but decreased in soil seed bank.There was a positive correlation between seed rain density and soil seed bank density among all the three restoration periods.The species similarity between seed rain or soil seed bank and aboveground vegetation decreased with the extension of restoration period.The shape of the seeds,specifically those with external appendages such as spines and crown hair,clearly had an effect on their dispersal,then resulting in lower seed density in soil seed bank.In addition,precipitation was a crucial factor in promoting rapid germination,also resulting in lower seed density in soil seed bank.Our findings provide valuable insights for guiding future interventions during the later periods of artificial C.korshinskii forest,such as sowing and restoration efforts using unmanned aerial vehicles. 展开更多
关键词 ecological restoration soil seed bank seed rain artificial forest vegetation desertification caragana korshinskii Tengger Desert
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Effect of Caragana korshinskii Silage at Different Growth Stages on the Feeding of Livestock
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作者 Bai HAN Mei HAN +3 位作者 Han WU Yuman LIN Jinjun HE Rong LIU 《Asian Agricultural Research》 2023年第7期54-57,共4页
[Objectives] Caragana korshinskii resources are rich in Ordos with a large planting area, but they have not been fully and reasonably utilized. This study aims to effectively convert C. korshinskii into high-quality f... [Objectives] Caragana korshinskii resources are rich in Ordos with a large planting area, but they have not been fully and reasonably utilized. This study aims to effectively convert C. korshinskii into high-quality feed, improve the quality of milk and meat of herbivores and increase production. [Methods] The utilization of C. korshinskii in feed was studied in various aspects, the factors were selected, the level was determined, and the multi-factor experiment—orthogonal experiment was conducted. [Results] The effect on the growth of sheep was in the order of silage > C. korshinskii feed > corn stalk silage > hay meal, and the effect on the growth of goats was in the order of hay meal > C. korshinskii feed > silage > corn stalk silage. [Conclusions] From the analysis of the range results, the best level combination was selected: in different growing seasons, C. korshinskii branch and leaf silage in full-bloom stage had the greatest effect on the growth of sheep and goats, and the fattening effect was the best;among the different silage methods of C. korshinskii, the C. korshinskii—corn stalk mixture silage had a good feeding effect for sheep and goats. 展开更多
关键词 FORAGE caragana korshinskii SILAGE Development and utilization
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水分胁迫下AM真菌对柠条锦鸡儿(Caragana korshinskii)生长和抗旱性的影响 被引量:26
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作者 贺学礼 刘媞 +1 位作者 安秀娟 赵丽莉 《生态学报》 CAS CSCD 北大核心 2009年第1期47-52,共6页
利用盆栽实验研究了水分胁迫条件下AM真菌对柠条锦鸡儿(Caragana korshinskii)生长和抗旱性的影响。在土壤相对含水量为80%、60%和40%条件下,分别接种摩西球囊霉(Glomus mosseae)和柠条锦鸡儿根际土著菌,结果表明,水分胁迫对AM真菌... 利用盆栽实验研究了水分胁迫条件下AM真菌对柠条锦鸡儿(Caragana korshinskii)生长和抗旱性的影响。在土壤相对含水量为80%、60%和40%条件下,分别接种摩西球囊霉(Glomus mosseae)和柠条锦鸡儿根际土著菌,结果表明,水分胁迫对AM真菌的接种效果有显著影响。不同水分条件下,接种AM真菌显著提高了宿主植物根系菌根侵染率。土壤相对含水量为40%-60%时,接种株的株高、茎粗、生物干重和叶片保水力明显高于不接种株;接种AM真菌提高了植株对土壤有效N和有效P的利用率,增加了植株全P、叶片叶绿素和可溶性糖含量以及SOD、POD、CAT等保护酶活性。土壤相对含水量为40%时,叶片MDA含量明显下降。水分胁迫条件下,以接种柠条锦鸡儿根际土著菌的效果最佳。AM真菌增强宿主植物的抗旱性可能源于促进宿主植物根系对土壤水分和矿质元素吸收的直接作用和改善植物体内生理代谢活动、提高保护酶活性的间接作用。 展开更多
关键词 AM真菌 水分胁迫 生长量 抗旱性 柠条锦鸡儿
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柠条(Caragana korshinskii)的水分生理生态学特性 被引量:84
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作者 王孟本 李洪建 柴宝峰 《植物生态学报》 CAS CSCD 北大核心 1996年第6期494-501,共8页
柠条的水分生理生态学研究表明.蒸腾速率为395.1±234.4mg·g-1·h-1(平均值±标准差);小枝水势为-1.588MPa;叶含水率为60.12±3.29%;蒸腾系数为72.82±19... 柠条的水分生理生态学研究表明.蒸腾速率为395.1±234.4mg·g-1·h-1(平均值±标准差);小枝水势为-1.588MPa;叶含水率为60.12±3.29%;蒸腾系数为72.82±19.88gH2O·gDW-1。林地土壤水分含量与蒸腾速率、小枝水势和叶含水率的关系十分密切。响应于年生长发育节律和水分条件的变化,柠条的抗旱性在年生长期初(5月)和旺盛生长阶段(8~9月)较弱.在高温干旱阶段(6~7月)和入冬之前(10月)较强。在年生长期中间(6~9月),柠条的抗旱性与蒸腾速率、小枝水势和叶含水率之间均具有负相关性。 展开更多
关键词 柠条 蒸腾速率 水分生理生态 森林树种
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Interspecific Transition Among Caragana microphylla, C. davazamcii and C. korshinskii Along Geographic Gradient. Ⅰ. Ecological and RAPD Evidence 被引量:12
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作者 马成仓 高玉葆 +2 位作者 刘惠芬 王金龙 郭宏宇 《Acta Botanica Sinica》 CSCD 2003年第10期1218-1227,共10页
The former plant population survey has shown that three genetically-related species, Caraganamicrophylla Lam., C. davazamcii Sancz. and C. korshinskii Kom., form a geographical replacement series inNei Mongol Plateau.... The former plant population survey has shown that three genetically-related species, Caraganamicrophylla Lam., C. davazamcii Sancz. and C. korshinskii Kom., form a geographical replacement series inNei Mongol Plateau. The present study on population distribution, taxonomy, morphology, development andgenetic structure demonstrated that the geographical distribution of these three species was successiveand in gradual change, thus forming a geographical cline which extended from the east to the west of NeiMongol Plateau. With an analysis of climate change over time, it was considered that the formation of thisgeographical cline was a result of plant adaptation to its natural environment. 展开更多
关键词 caragana microphylla C. davazamcii C. korshinskii interspecific transition alonggeographical gradient Morphology TAXONOMY RAPD
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Interspecific Transition Among Caragana microphylla, C. davazamcii and C. korshinskii Along Geographic Gradient. Ⅱ. Characteristics of Photosynthesis and Water Metabolism 被引量:13
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作者 马成仓 高玉葆 +1 位作者 郭宏宇 王金龙 《Acta Botanica Sinica》 CSCD 2003年第10期1228-1237,共10页
The characteristics of photosynthesis and water metabolism of Caragana microphylla Lam.,C. davazamcii Sancz. and C. korshinskii Kom. populations in different sites (117.6o-105.7o E, 44.6o-38.8o N)were studied. (1) Fro... The characteristics of photosynthesis and water metabolism of Caragana microphylla Lam.,C. davazamcii Sancz. and C. korshinskii Kom. populations in different sites (117.6o-105.7o E, 44.6o-38.8o N)were studied. (1) From the east to the west, the responses of the three species to photosyntheticallyavailable radiation (PAR) in net photosynthesis rate increased, the relative humidity of the air whichcorresponded to the occurrence of maximum photosynthesis rate decreased, and the corresponding airtemperature increased. Along the same gradient, the before-noon superiority of the photosynthesis be-came evident, and the photosynthesis rate and the light use efficiency (LUE ) increased, while the transp-iration rate decreased, thus the water use efficiency (WUE ) increased notably, and the leaf water contentdecreased gradually. From the east to the west, the plants took a water-saving strategy step by step withhigher photosynthesis rate and lower transpiration rate. These physiological changes in the plants wereadaptable to the conditions of light, temperature and humidity in the habitat of the plants, and might be thebiological foundation for the geographical transition among C. microphylla , C. davazamcii and C. korshinskii.(2) The adaptation of photosynthetic system of C. microphylla , C. davazamcii and C. korshinskii to PAR, airhumidity and temperature exhibited the interspecific continuity, which was consistent with theenvironmental gradient. In different species and different sites, the diurnal changes of net photosynthesisrate, the daily cumulative value of net photosynthesis, the diurnal changes of transpiration rate, the dailycumulative value of transpiration, the water use efficiency and the diurnal changes of leaf water contentvaried with longitudinal descent (from the east to the west). The characteristics of photosynthesis andwater metabolism indicated that the geographical transition among C. microphylla , C. davazamcii and C.korshinskii was in gradual change, and these three species formed a geographical cline. 展开更多
关键词 caragana microphylla C. davazamcii C. korshinskii geographical transition PHOTOSYNTHESIS water metabolism
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内蒙古高原小叶锦鸡儿(Caragana microphylla)中间锦鸡儿(C.davazamcii)和柠条锦鸡儿(C.korshinskii)的遗传多样性及遗传关系 被引量:9
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作者 郭宏宇 高玉葆 +3 位作者 马成仓 任安芝 吴建波 王银华 《生态学报》 CAS CSCD 北大核心 2008年第8期3729-3736,共8页
采用RAPD技术对10个具较大地理跨度的小叶锦鸡儿、中间锦鸡儿和柠条锦鸡儿种群的遗传多样性和遗传关系进行了研究。共检测到678个位点,多态条带比率(PPB)为100%;特有位点41个,占6.05%。总体上3种锦鸡儿的遗传多样性表现出自东向西递减... 采用RAPD技术对10个具较大地理跨度的小叶锦鸡儿、中间锦鸡儿和柠条锦鸡儿种群的遗传多样性和遗传关系进行了研究。共检测到678个位点,多态条带比率(PPB)为100%;特有位点41个,占6.05%。总体上3种锦鸡儿的遗传多样性表现出自东向西递减的趋势,分析表明其与生长地点年均气温呈显著负相关。AMOVA表明:3种锦鸡儿种间变异只占总体变异的6.08%,且显著性检验表明这种变异不显著;种内种群间的变异占总变异的11.90%;总变异的主要部分来自种群内部(82.02%)。3种锦鸡儿各种群总体分析结果表明:种群内变异比率Hpop/Hsp为0.8013,基因分化系数Gst为0.1603,种群每代迁移数Nm为2.6192,显示种群间存在一定强度的基因流,3种锦鸡儿间表现为异交性。3种锦鸡儿多样性高低及种群聚类分布格局都表现出一定的地理连续性。 展开更多
关键词 小叶锦鸡儿 中间锦鸡儿 柠条锦鸡儿 RAPD 地理种群 遗传多样性 遗传关系
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Characteristics of root pullout resistance of Caragana korshinskii Kom.in the loess area of northeastern Qinghai-Tibet Plateau,China 被引量:4
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作者 LIU Yabin SHI Chuan +5 位作者 YU Dongmei WANG Shu PANG Jinghao ZHU Haili LI Guorong HU Xiasong 《Journal of Arid Land》 SCIE CSCD 2022年第7期811-823,共13页
Roots exert pullout resistance under pullout force,allowing plants to resist uprooting.However,the pullout resistance characteristics of taproot-type shrub species of different ages remain unclear.In this study,in ord... Roots exert pullout resistance under pullout force,allowing plants to resist uprooting.However,the pullout resistance characteristics of taproot-type shrub species of different ages remain unclear.In this study,in order to improve our knowledge of pullout resistance characteristics of taproot systems of shrub species,we selected the shrub species Caragana korshinskii Kom.in different growth periods as the research plant and conducted in situ root pullout test.The relationships among the maximum pullout resistance,peak root displacement,shrub growth period,and aboveground growth indices(plant height and plant crown breadth)were analyzed,as well as the mechanical process of uprooting.Pullout resistance of 4-15 year-old C.korshinskii ranged from 2.49(±0.25)to 14.71(±4.96)kN,and the peak displacement ranged from 11.77(±8.61)to 26.50(±16.09)cm.The maximum pullout resistance and the peak displacement of roots increased as a power function(R^(2)=0.9038)and a linear function(R^(2)=0.8242)with increasing age,respectively.The maximum pullout resistance and the peak displacement increased with increasing plant height;however,this relationship was not significant.The maximum pullout resistance increased exponentially(R^(2)=0.5522)as the crown breadth increased.There was no significant relationship between the peak displacement and crown breadth.The pullout resistance and displacement curve were divided into three stages:the initial nonlinear growth,linear growth,and nonlinear stages.Two modes of failure of a single root occurred when the roots were subjected to vertical loading forces:the synchronous breakage mode and the periderm preferential breakage mode.These findings provide a foundation for further investigation of the soil reinforcement and slope protection mechanisms of this shrub species in the loess area of northeastern Qinghai-Tibet Plateau,China. 展开更多
关键词 loess area Qinghai-Tibet Plateau pullout resistance growth period aboveground growth indices pullout test caragana korshinskii
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Succession of soil bacterial and fungal communities of Caragana korshinskii plantation in a typical agro-pastoral ecotone in northern China over a 50-a period
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作者 MA Gailing GOU Qianqian +1 位作者 WANG Guohua QU Jianjun 《Journal of Arid Land》 SCIE CSCD 2021年第10期1071-1086,共16页
Bacterial and fungal communities play critical roles in reestablishing vegetation structure,function and biodiversity in ecosystem restoration in arid and semi-arid areas.However,the long-term successional changes in ... Bacterial and fungal communities play critical roles in reestablishing vegetation structure,function and biodiversity in ecosystem restoration in arid and semi-arid areas.However,the long-term successional changes in bacterial and fungal communities that occur with artificial vegetation development are not fully understood.In this study,we investigated the successional changes in bacterial and fungal communities in Caragana korshinskii Kom.plantation over a period of 50 a(6,12,18,40 and 50 a)and their relationships with key soil environmental factors in a typical agro-pastoral ecotone,northern China.The results showed that bacterial and fungal diversities(α-andβ-diversity)were significantly affected by plantation age;moreover,the change in fungal community was more evident than that in bacterial community.Soil samples from 12 a plantation had the highest(P<0.05)bacterial and fungalα-diversity(i.e.,abundance-based coverage estimator(ACE)and Chao1 index)at 0-10 cm depth compared with other samples.However,soil samples from plantation at the late recovery stage(40-50 a)had the highestα-diversity at 10-20 cm depth.Soil bacterial community was not significantly affected by plantation age at the genus level;but,soil fungal community was significantly affected at the genus level.Overall,Mortierella and Chaetomium were the dominant genera at natural recovery stage(0 a);Inocybe was the dominant genus at the early recovery stage(6-12 a);Inocybe and Mortierella were the dominant genera at the mid-recovery stage(12-40 a);And Mortierella,Cladosporium and Humicola were the dominant genera at the late recovery stage(40-50 a).Redundancy analysis(RDA)showed thatβ-glucosidase activity,total nitrogen and soil organic carbon were closely associated with bacterial community composition,while alkaline phosphatase,urease activity and total nitrogen were associated with fungal community composition,indicating that changes in enzyme activity and soil nutrients were the most important determinants of dominant genera.Furthermore,pathogenic microorganisms(Cladosporium and Humicola)were dominant in soils from 40-50 a plantation,which may affect plant growth,resulting in the decline of C.korshinskii plantation.Overall,the findings of this study improve the understanding of ecological patterns of bacterial and fungal communities in artificial vegetation and provide an important scientific basis for comprehensive ecological restoration management in arid and semi-arid areas. 展开更多
关键词 bacteria FUNGI diversity dominant genus ecological pattern caragana korshinskii
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Eco-physiological mechanisms of Caragana korshinskii Kom. adaptation to extreme drought stress: Leaf abscission and maintaining stem chloroplast integrity
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作者 DangHui Xu XiangWen Fang +2 位作者 ZhenJun Bin Gang Wang PeiXi Su 《Research in Cold and Arid Regions》 2012年第6期498-504,共7页
In order to study the eco-physiological mechanisms of C. korshinskii adaptation to extreme drought stress, we investigated the variations of water content in soil, leaves, and stems, the chlorophyll a and b and the ca... In order to study the eco-physiological mechanisms of C. korshinskii adaptation to extreme drought stress, we investigated the variations of water content in soil, leaves, and stems, the chlorophyll a and b and the carotenoid content in leaves and stems, as well as changes of chloroplast ultrastructure in 2-year-old C. korshinskii specimens during a progressive soil drought process (by ceasing watering until all leaves were shed) and a subsequent rehydmtion process. During the dehydration process, the chlorophyll a and b and carotenoid contents in the leaves decreased, as did the carotenoid content in the stems. During the 4-day rehydration process, the chlorophyll a and b and carotenoid contents in the leaves and stems increased and gradually returned to normal levels. During ongoing drought stress, chloroplasts in the leaves broke away from cell walls and appeared in the center of cells. Under severe drought stress, the mesophyll ultrastmcture and chloroplast configuration in leaves were irreversibly disturbed, as mani- fested by the inner and outer membranes being destroyed; the thylakoid system disintegrated, the starch grain disappeared, and parts of cell tissue were dismantled into debris. However, the mesophyll ultrasWacture and chloroplast configuration in the stems remained complete. This indicates that C. korshinskii utilizes leaf abscission to reduce the surface area to avoid damage from ex- treme drought stress, and maintains chloroplast integrity and a considerable amount of chlorophyll to enable a rapid recovery of photosynthesis under the rehydration process. 展开更多
关键词 caragana korshinskii extreme drought stress leaf abscission chloroplast ultrastructure
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Experimental Study on Friction Characteristics of Caragana korshinskii Kom
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作者 Xiao LIU Yuming GUO 《Agricultural Science & Technology》 CAS 2015年第7期1480-1483,共4页
Caragana korshinskii Kom, which is a kind of excellent shrubs, has strong resistance to windstorms, and it is also a kind of forage that is of high nutritional value as well as a forming fuel conversion resource that ... Caragana korshinskii Kom, which is a kind of excellent shrubs, has strong resistance to windstorms, and it is also a kind of forage that is of high nutritional value as well as a forming fuel conversion resource that is of high caloric. Caragana korshinskii Kom is of high lignifications after growing for a few years and the toughness of it is considerably high. Currently in China, equipments of harvesting and processing for ripe crops can hardly finish the mechanized production for Caragana korshinskii Kom. Friction characteristics of woody material for Caragana korshinskii Kom under different conditions should be given when the relevant operation machinery is designed, which can provide physical parameters for transportation of Caragana korshinskii Kom as well as the designing of relevant machinery. The paper bases on the research of friction characteristics between Caragana korshinskii Kom whose diameter of 7, 10, and 13 mm under sampling directions of 0°, 45°,and 90° and machinery materials that are commonly used such as steel plate, rubber sheet and so on, and meanwhile the test considers factors such as different conditions of Caragana korshinskii Kom, different materials of machines, different angles and so on. The data strongly suggests that the average static, dynamic friction coefficient between Caragana korshinskii Kom and steel plate is 0.399 711 and0.353 022, respectively; The average static and dynamic friction coefficient between Caragana korshinskii Kom and rubber sheet is 0.965 178 and 0.883 667, respectively. The maximum of static and dynamic friction coefficients is when the angle between the direction of sampling and the direction of movement is vertical. As the angle increased, the dynamic and static friction coefficient decreased. The friction coefficient between Caragana korshinskii Kom and steel plate were increased with the increase of the diameter of Caragana korshinskii Kom, but the diameter have no effect on the dynamic friction coefficient between Caragana korshinskii Kom and rubber plate. The conclusion of this paper can provide references for research on machines that are relevant to transportation and particle forming of Caragana korshinskii Kom. 展开更多
关键词 caragana korshinskii kom Friction characteristics Thestatic and dynam-ic friction coefficient Experimental study
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黄土高原半干旱区柠条(Caragana korsh inskii)树干液流动态及其影响因子 被引量:37
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作者 夏永秋 邵明安 《生态学报》 CAS CSCD 北大核心 2008年第4期1376-1382,共7页
应用热脉冲技术在黄土高原神木县六道沟小流域于2006年6月13至25日测定了两种不同密度柠条(Caragana korshinskii)群落的树干液流动态。同时测量了土壤水分、太阳辐射、大气温度、相对湿度、风速、水汽压亏缺和作物参考蒸散等环境因子,... 应用热脉冲技术在黄土高原神木县六道沟小流域于2006年6月13至25日测定了两种不同密度柠条(Caragana korshinskii)群落的树干液流动态。同时测量了土壤水分、太阳辐射、大气温度、相对湿度、风速、水汽压亏缺和作物参考蒸散等环境因子,并根据植物蒸腾的P-M公式,反推计算冠层导度。结果表明,除风速外,柠条树木液流与太阳辐射、大气温度、相对湿度、水汽压亏缺、作物参考蒸散均显著相关,且可用太阳辐射的线性表达式来估测。不同密度群落的日蒸腾量随叶面积指数增大而增加,叶面积指数为2.3的群落平均日蒸腾为3.83mm d-1m-2,而叶面积指数为1.1的林分平均日蒸腾1.64mm d-1m-2。冠层导度与气象因子关系复杂,当土壤水分不存在亏缺时,冠层导度与太阳辐射、大气温度、作物参考蒸散因子显著相关,与水汽亏缺和相对湿度因子无相关性;当土壤水分存在亏缺时,冠层导度与太阳辐射、大气温度、作物参考蒸散因子无相关关系,而与水汽亏缺和相对湿度因子显著相关。 展开更多
关键词 黄土高原 柠条(caragana korshinskii) 树干液流 冠层导度 叶面积指数 气象因子
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柠条复配基质对设施茄子生长发育的影响
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作者 刘艳妮 魏恬 +2 位作者 曲继松 张丽娟 朱倩楠 《北方园艺》 CAS 北大核心 2024年第12期34-41,共8页
以设施茄子为试材,将柠条发酵料、草炭、蛭石、珍珠岩按照一定比例配制复配基质,采用不同基质栽培条件下设施茄子生长比较分析法,研究不同基质的理化性质对设施茄子的生长指标、生理指标的影响,筛选最佳的柠条复配基质配比,以期为植物... 以设施茄子为试材,将柠条发酵料、草炭、蛭石、珍珠岩按照一定比例配制复配基质,采用不同基质栽培条件下设施茄子生长比较分析法,研究不同基质的理化性质对设施茄子的生长指标、生理指标的影响,筛选最佳的柠条复配基质配比,以期为植物废弃资源开发提供参考依据。结果表明:当发酵料与蛭石比例为3∶1、2∶2或1∶3时不利于植物的生长,综合表现最差;当发酵料与珍珠岩比例为1∶3或3∶1时,不利于株高、茎粗叶片数的增加,比例为2∶2植物的干物质积累量和抗性较差。当发酵料与草炭的比例为1∶3或3∶1时最有利于茄子株高、茎粗、叶片数、地上和地下部分干鲜质量的积累,茄子的叶绿素和根系活力也较高,抗性为最强。 展开更多
关键词 柠条 复配基质 茄子 生长发育
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干旱风沙区不同林龄柠条锦鸡儿水分利用特征研究
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作者 王东清 马丽慧 张蕾蕾 《贵州农业科学》 CAS 2024年第11期109-115,共7页
【目的】探明干旱风沙区老龄、中龄和幼龄柠条在干旱严苛环境条件下的用水策略,对当地生态环境保护与可持续发展提供理论依据。【方法】采用稳定同位素技术,通过测定柠条可利用的水源和枝条木质部水分的同位素特征比率,应用IsoSource模... 【目的】探明干旱风沙区老龄、中龄和幼龄柠条在干旱严苛环境条件下的用水策略,对当地生态环境保护与可持续发展提供理论依据。【方法】采用稳定同位素技术,通过测定柠条可利用的水源和枝条木质部水分的同位素特征比率,应用IsoSource模型对比研究不同林龄人工柠条林主要利用水分来源及各水源的贡献率,并结合土壤水分的补给特征,综合分析人工柠条林对干旱严苛环境的适应机制。【结果】在整个生长季,3种林龄柠条在0~40 cm浅土层土壤含水量较为波动,在160~200 cm深土层柠条土壤含水量较为稳定。不同林龄柠条0~200 cm土层平均土壤含水量为建植20年>建植8年>建植4年。不同林龄柠条各土层水分贡献率均不同,建植20年的柠条主要利用土层80~120 cm的土壤水分,贡献率为49.5%;建植8年的柠条主要利用0~20 cm和80~120 cm土层土壤水分,贡献率分别为59.2%和14.8%;建植4年的柠条主要利用土层0~20 cm的土壤水分,贡献率达85.7%。【结论】不同林龄柠条用水策略与各土层土壤含水量的高低有直接关系。土层土壤含水量高低决定各土层水分贡献率的大小。老龄柠条主要利用深层土壤水分,中龄柠条主要利用浅层和中层土壤水分,幼龄柠条主要利用浅层土壤水分。 展开更多
关键词 柠条锦鸡儿 林龄 干旱风沙区 水分来源 水分贡献率 稳定同位素
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宁夏干旱风沙区不同季节柠条锦鸡儿水分利用特征研究
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作者 王东清 许浩 +1 位作者 马丽慧 张蕾蕾 《浙江农业科学》 2024年第10期2438-2442,共5页
柠条锦鸡儿是宁夏干旱风沙区生态重建的主要树种,为明确宁夏干旱风沙区不同季节柠条锦鸡儿在干旱严苛环境条件下的用水策略,该研究采用稳定同位素技术,通过测定柠条锦鸡儿可利用的水源和枝条木质部水分的同位素特征比率,应用IsoSource模... 柠条锦鸡儿是宁夏干旱风沙区生态重建的主要树种,为明确宁夏干旱风沙区不同季节柠条锦鸡儿在干旱严苛环境条件下的用水策略,该研究采用稳定同位素技术,通过测定柠条锦鸡儿可利用的水源和枝条木质部水分的同位素特征比率,应用IsoSource模型,从定性和定量角度出发,对比研究不同季节柠条锦鸡儿主要利用水分来源及各水源的贡献率,同时结合土壤水分的补给特征,综合分析柠条锦鸡儿应对干旱严苛环境的适应机制。结果表明:在0~60 cm土层,不同季节柠条锦鸡儿土壤含水量差异显著,雨季的土壤含水量均值为14.66%,而旱季的土壤含水量仅为9.69%。在80~200 cm土层,不同季节柠条锦鸡儿土壤含水量差异不显著。不同季节柠条锦鸡儿各水分来源贡献率均不同。在雨季,雨水的贡献率高达93.00%,而土壤水分贡献率仅为7.00%。在旱季,80~200 cm土层的土壤水,水分贡献率达到64.10%,0~60 cm土层土壤水分有部分利用。可见,一定降雨事件影响浅层土壤水分含量,对深层土壤水分影响不显著。不同季节柠条用水策略与各土层土壤含水量的高低有直接关系。雨季,柠条锦鸡儿利用雨水;旱季,柠条锦鸡儿主要利用深层土壤水分,对浅层水分也有一定利用。柠条锦鸡儿在不同季节能通过转化不同水源利用来应对干旱严苛的环境,从而维持自身生长。 展开更多
关键词 水分来源 稳定同位素 季节 柠条 干旱风沙区
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荒漠草原人工柠条引入后土壤大孔隙拓扑结构演变特征
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作者 杨志强 孟晨 +3 位作者 王兴 朱志昊 宋乃平 杜灵通 《水土保持研究》 CSCD 北大核心 2024年第2期92-100,共9页
[目的]认识人工柠条种植对土壤生态过程的影响,从而为人工植被的管理提供科学依据。[方法]以宁夏盐池县典型荒漠草原区风沙土生境的草地(0 a)及9,14,24,35 a生人工柠条林为对象,分别进行原状土柱采集、CT扫描及图像处理分析,获取土壤大... [目的]认识人工柠条种植对土壤生态过程的影响,从而为人工植被的管理提供科学依据。[方法]以宁夏盐池县典型荒漠草原区风沙土生境的草地(0 a)及9,14,24,35 a生人工柠条林为对象,分别进行原状土柱采集、CT扫描及图像处理分析,获取土壤大孔隙几何分布特征,量化大孔隙表面积、等效直径和连接度等拓扑结构参数,研究了柠条生长过程中土壤大孔隙演变特征。[结果]通过三维图像可以看出,和0 a样地相比,随着林龄增加,各样地在0—200 mm土层大孔隙数量明显增多且结构更加复杂。定量分析表明,和0 a样地相比,不同林龄柠条林地在同一土层,大孔隙数量密度、长度密度、等效直径、连接度之间差异显著(p<0.05),而表面积密度、体积密度无显著差异(p>0.05)。具体表现为在0—100 mm和100—200 mm土层大孔隙数量密度、长度密度均显著增加(p<0.05),且随着林龄增加,表层土壤(0—100 mm)增幅要大于深层土壤(100—200 mm);等效直径在0—100 mm土层显著减小,在100—200 mm土层显著增加(p<0.05),而连接度变化规律恰好相反。进一步分析发现,林龄与大孔隙数量密度、长度密度、表面积密度呈显著正相关(p<0.05),与大孔隙等效直径呈显著负相关(p<0.01),与大孔隙体积密度差异不显著(p>0.05)。[结论]人工柠条林的引入会促进土壤大孔隙致密网络状结构形成,改善大孔隙表面积、连接度等拓扑结构,且随着林龄增加,对土壤改良效果越明显。 展开更多
关键词 荒漠草原 人工柠条 土壤大孔隙 拓扑结构 CT扫描
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植物叶片悬浮培养的研究 被引量:1
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作者 安惠韬 王茜 王瑞刚 《林业科技》 2024年第1期29-33,共5页
对于植物为适应胁迫环境的生理变化及其适应胁迫环境能力的研究是近年来的热点问题。渗透调节机制是植物适应胁迫环境的主要生理机制,其中植物叶片细胞渗透势的测定与研究是确定植物渗透调节能力的关键。本研究以拟南芥、柠条、落叶松... 对于植物为适应胁迫环境的生理变化及其适应胁迫环境能力的研究是近年来的热点问题。渗透调节机制是植物适应胁迫环境的主要生理机制,其中植物叶片细胞渗透势的测定与研究是确定植物渗透调节能力的关键。本研究以拟南芥、柠条、落叶松为研究对象,经过梯度浓度蔗糖溶液培养,以质壁分离现象的发生为标准测定植物叶片细胞渗透势。通过显微镜观察发现,拟南芥、柠条、落叶松叶片细胞等渗浓度分别为0.375、0.575、0.825 mol/L(蔗糖溶液)。计算得出,拟南芥、柠条、落叶松叶片细胞渗透势分别为-921.3、-1 412.66、-2 026.86 kPa。对南芥、柠条、落叶松等植物叶片细胞渗透势的测定,有利于提高植物组织培养效率、提高植物植物存活率。同时,为植物渗透调节机制的研究、优良品种的选育提供理论依据。 展开更多
关键词 拟南芥 柠条 落叶松 质壁分离 渗透势 等渗
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干旱胁迫下柠条锦鸡儿叶片SSH文库构建及CkWRKY1基因克隆 被引量:19
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作者 杨杞 张涛 +6 位作者 王颖 李高 尹佳佳 韩晓敏 齐力旺 李国婧 王瑞刚 《林业科学》 EI CAS CSCD 北大核心 2013年第7期62-68,共7页
为研究柠条锦鸡儿抗旱的分子机制,挖掘干旱响应相关基因,成功构建干旱胁迫下柠条锦鸡儿叶片的抑制性差减杂交(SSH)文库,获得1286条高质量的EST序列,平均长度475bp,拼接得到Unigenes645条。对这些Unigenes进行Blast比对注释后发现很多抗... 为研究柠条锦鸡儿抗旱的分子机制,挖掘干旱响应相关基因,成功构建干旱胁迫下柠条锦鸡儿叶片的抑制性差减杂交(SSH)文库,获得1286条高质量的EST序列,平均长度475bp,拼接得到Unigenes645条。对这些Unigenes进行Blast比对注释后发现很多抗旱相关基因,例如LEA蛋白、DHN蛋白编码基因,MYB、bZIP、WRKY、NAC和bHLH转录因子等。通过RACE技术克隆其中1个WRKY转录因子的cDNA全长,命名为CkWRKY1,GenBank登录号为JX987095。CkWRKY1编码330个氨基酸的蛋白质,氨基酸序列中有1个"WRKYGQK"的WRKY转录因子家族保守序列,属于第Ⅱ类WRKY转录因子。利用实时荧光定量PCR技术检测发现,CkWRKY1基因在干旱处理后mRNA的表达水平明显上升,预示该转录因子可能与柠条锦鸡儿抗旱的分子机制相关。 展开更多
关键词 柠条锦鸡儿 干旱胁迫 抑制性差减杂交(SSH)文库 WRkY 基因克隆
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柠条锦鸡儿CkNCED1基因启动子的克隆及表达分析 被引量:10
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作者 任爱琴 易津 +2 位作者 高洪文 李俊 王学敏 《草业学报》 CSCD 北大核心 2013年第2期165-170,共6页
利用染色体步移(Genome walking)技术,克隆柠条锦鸡儿CkNCED1基因上游启动子序列。经顺式元件预测分析,该序列除基本的启动元件之外,还含有2个脱落酸诱导响应元件ABRE、此外还含有多个逆境相关的元件。将CkNCED1基因启动子区连接到pGWB... 利用染色体步移(Genome walking)技术,克隆柠条锦鸡儿CkNCED1基因上游启动子序列。经顺式元件预测分析,该序列除基本的启动元件之外,还含有2个脱落酸诱导响应元件ABRE、此外还含有多个逆境相关的元件。将CkNCED1基因启动子区连接到pGWB533植物表达载体上,构建Promoter::GUS载体,GUS组织化学染色结果表明,CkNCED1基因在植物的叶、根、茎、花和角果的维管组织中均有表达,且在叶片中表达强度最高。以上研究确定了柠条锦鸡儿CkNCED1基因的表达部位和强度。进一步说明CkNCED1基因在ABA合成调控中发挥重要作用,为深入研究基因功能奠定基础。 展开更多
关键词 柠条锦鸡儿 CkNCED1基因启动子 GUS组织化学染色 ABA响应元件
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